Showers and thunderstorms developed in a humid airmass ahead of an approaching cold front during the afternoon across central and eastern Massachusetts.  Some of these thunderstorms were severe, producing damaging wind and even microburst damage.  These severe winds brought down wires, limbs, and trees, which, in turn, injured people, damaged cars and houses, closed roads, and knocked out electricity to thousands of customers.In Natick, a fast-moving severe thunderstorm knocked down at least one dozen trees at a state park.  Four females who had sought refuge from the storm under a tree were injured when the tree blew down.  They were treated for minor injuries.In Douglas, microburst damage was reported along Railroad Avenue.  This microburst brought down many large trees, which caused many roads to be blocked and impassible, and it resulted in one minor and one significant injury.  The person significantly injured is expected to recover.Another microburst downed approximately 100 trees in the Wenham area, with about 40 trees downed along a short stretch of Cherry Street in Wenham.  A number of the downed trees ranged from one foot to three feet in diameter.  Some of these trees damaged homes, vehicles, and wires.Six known injuries resulted from these severe thunderstorms.

Thunderstorm Wind in ESSEX, MASSACHUSETTS
From 05-AUG-05 15:25:00 to 05-AUG-05 15:25:00 (EST)
Location: TOPSFIELD
Magnitude: 50 EG
Property damage: 10K
Reported by: AMATEUR RADIO

Thunderstorm Wind in NORFOLK, MASSACHUSETTS
From 05-AUG-05 16:35:00 to 05-AUG-05 16:35:00 (EST)
Location: MEDWAY
Magnitude: 50 EG
Property damage: 10K
Reported by: AMATEUR RADIO

Thunderstorm Wind in NORFOLK, MASSACHUSETTS
From 05-AUG-05 16:50:00 to 05-AUG-05 16:50:00 (EST)
Location: MEDWAY
Magnitude: 50 EG
Property damage: 10K
Reported by: AMATEUR RADIO

Thunderstorm Wind in PLYMOUTH, MASSACHUSETTS
From 05-AUG-05 16:36:00 to 05-AUG-05 16:36:00 (EST)
Location: SCITUATE
Magnitude: 50 EG
Property damage: 5K
Reported by: AMATEUR RADIO

Thunderstorm Wind in WORCESTER, MASSACHUSETTS
From 05-AUG-05 16:05:00 to 05-AUG-05 16:15:00 (EST)
Location: DUDLEY
Magnitude: 50 EG
Property damage: 30K
Reported by: AMATEUR RADIO

Thunderstorm Wind in MIDDLESEX, MASSACHUSETTS
From 05-AUG-05 16:25:00 to 05-AUG-05 16:25:00 (EST)
Location: NORTH READING
Magnitude: 50 EG
Property damage: 5K
Reported by: AMATEUR RADIO

Thunderstorm Wind in MIDDLESEX, MASSACHUSETTS
From 05-AUG-05 15:15:00 to 05-AUG-05 15:25:00 (EST)
Location: NATICK
Magnitude: 50 EG
Property damage: 15K
Reported by: AMATEUR RADIO

Thunderstorm Wind in MIDDLESEX, MASSACHUSETTS
From 05-AUG-05 15:40:00 to 05-AUG-05 15:45:00 (EST)
Location: NORTH READING
Magnitude: 50 EG
Property damage: 15K
Reported by: AMATEUR RADIO

Thunderstorm Wind in BRISTOL, MASSACHUSETTS
From 05-AUG-05 16:55:00 to 05-AUG-05 16:55:00 (EST)
Location: MANSFIELD
Magnitude: 50 EG
Property damage: 10K
Reported by: AMATEUR RADIO

Thunderstorm Wind in ESSEX, MASSACHUSETTS
From 05-AUG-05 15:45:00 to 05-AUG-05 15:45:00 (EST)
Location: WENHAM
Magnitude: 50 EG
Property damage: 50K
Reported by: AMATEUR RADIO

Thunderstorm Wind in PLYMOUTH, MASSACHUSETTS
From 05-AUG-05 17:05:00 to 05-AUG-05 17:25:00 (EST)
Location: WHITMAN
Magnitude: 50 EG
Property damage: 20K
Reported by: AMATEUR RADIO

Thunderstorm Wind in NORFOLK, MASSACHUSETTS
From 05-AUG-05 15:48:00 to 05-AUG-05 15:48:00 (EST)
Location: QUINCY
Magnitude: 50 EG
Property damage: 5K
Reported by: AMATEUR RADIO

Thunderstorm Wind in SUFFOLK, MASSACHUSETTS
From 05-AUG-05 17:15:00 to 05-AUG-05 17:15:00 (EST)
Location: DORCHESTER
Magnitude: 50 EG
Property damage: 8K
Reported by: AMATEUR RADIO

Thunderstorm Wind in HAMPDEN, MASSACHUSETTS
From 05-AUG-05 15:50:00 to 05-AUG-05 15:50:00 (EST)
Location: WALES
Magnitude: 50 EG
Property damage: 5K
Reported by: AMATEUR RADIO

Thunderstorm Wind in WORCESTER, MASSACHUSETTS
From 05-AUG-05 16:45:00 to 05-AUG-05 16:47:00 (EST)
Location: MILFORD
Magnitude: 53 MG
Property damage: 15K
Reported by: AMATEUR RADIO